Drill attachment.



F. T. COOK.

DRlLL ATTACHMENT.

APPLIGATloN FILED MAY2.1914.

1,1 05,406. Patented July 28, 1914.

/N VEN TUR MKZ M By M Arm/mns EN 1E FRANK T. COOK, OF MIAMI, OKLAHOMA.

DRILL ATTACHMENT.

maaien.

Specification of Letters Patent.

Patented July 28, 1 911i.

Application filed May 2, 1914. S61'ialN0.835,863.

To all fiaioin, t fiaciji/ conce/rn Be it known that I, FRANK T. Cook, a citizen of the United States of America, and residing at Miami, in the county of Ottawa and State of Oklahoma, have invented certain new and useful Improvements in Drill Attachments, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

My invention relates to mining drills, and the object thereof is to provide means for withdrawing a drill from a drill hole in the event of its becoming' stuck therein, and irrespective of the length of the drill or the depth of the hole, with very little trouble or waste of time.

It is well known that drill bits, as used in power driven drilling machines, often become mucked or stuck in the hole by the accumulation of line rock cuttings, mixed with water, and forming a muck or hard thick clay around the reduced Shank of the drill, just behind the head or cutting end, the continued pounding 0f the drill packing this muck so hard that it is impossible to withdraw the drill from the hole by hand, and it can only be withdrawn by means of the feed screw of the machine, but the length of the said feed screw is frequently insufficient to withdraw the drill because of 4the length of the drill and the depth of the hole. In withdrawing a drill of less length than the feed screw all that is necessary is to reverse the direction of movement of the latter, a crank being provided for this purpose7 and two side rods are also provided at the Sides of the said screw to serve as a brace for such drill withdrawal but, when the drill exceeds the operative length of the feed screw, and of these side rods, the drill cannot be withdrawn, by said screw, as will be obvious, and it was in order to overcome this inability that my present invention was conceived.

My invention is fully described in the following specification, of which the accompanying drawings form a part, in which the same reference characters are used to designate the saine parts in each of the views, and in which Figure l is a fragmentary showing, partly in cross-section, of the conventional feed screw, crank, crosshead, and side bars, neither the drill, or machine being shown as they may be of any desired construction and form no part of this invention; Fig. 2 is Fig. 3 is taken on the a fragmentary view but showand section ln the drawings forming a part of this application I which is revo operable by parallelism tl means of a crank side of said feed screw shown a erossliead a in mounted a feed screw o2, and on each is a rod c arranged in said side rods beingl have lubly ierewith,

provided, each, with a shoulder (f2 and a threaded end c adapted to be passed through suitable holes in the orosshead and be se cured in such position by nuts o, this all being of conv In machines of this type the drill is entional forni.

ranged in a carriage slidably arranged on a xed portion of the said machine, the feed screw being' iii engagement with said carriage and the tion whereby side rods with said fixed porsaid carriage and drill are positively moved with respect to said fixed portion ot the machine, either outwardly to 'teed or inwardly it' the drill he the feed screw, onlyr to withdraw the drill but, ot greater relative length than a partial withdrawal of said drill is possible by means of the feed screw, and lve pass the muck possibility I lengths to suit the saine length,

provided, each,

ry often not sutiieiently far to l'n order to overcome this provide extension rods (Z, of conditions but both of the and said extension rods are with a threaded recess (Z2 adapted to receive the threaded end c of the rods e, said rods (Z being provided, at the opposite end threaded port with the ei'osshead s, each, with an externally ion (Z3 adapted for engagement and with the nuts c, and

with a shoulder (Z4.

In practice, mucked or stuck 1n withdrawn to by turning the direction, aft moved from t the crank b2 permit the cr the side bars ciently far to when a drill becomes a drill hole, it is first the apacity of the feed screw crank b2 in, a corresponding er which the nuts c are rehe conventional side rods c and is then revolved reverscly to Osshead a to move away from c to a distance therefrom sutliadmit the extension rods CZ over the ends of the rods c and upon which they are firmly screwed and, when so secured, the

crank is again turned in the first named direction to permit the crosshead to become firmly seated extension rod said rods bei against the shoulders d" of the s (l, the threaded ends (Z3 of ng passed through the corresponding holes in the crosshead, after which the nuts c* are firmly screwed on the ends d3 of the extension rods Z and an additional withdrawal of the drill is possible by means of the feed screw in the ratio of the length of the extension rods d, and this o-peration may be repeated with supplemental extension rods or longer extension rods may be substituted for those previously used, said extension rods, of whatever length, being provided with a male and a female threaded end of the same diameterl and pitch whereby they will not alone i'it each other, but also the conventional rods c and the nuts c4. lt will thus be seen that drills may be withdrawn from the muck regardless of the length of the drills or of the extent of the muck by means of the feed screw o without trouble or loss of time and, while l have shown a present preferred form of the extension rods (Z, it will be obvious that l am not limited thereto, nor lto the lengths thereof, nor to other details, and, with a reservation to myself of all changes in and modifications of the form shown and described as will come within the scope of the following` claims,

What l claim as new, and desire to secure by Letters Patent, is i l. ln a drilling machine having a feed screw, a crosshead for supporting the same and brace rods for said crosshead; an eXtension rod adapted for insertion between each brace rod and said crosshead, and means for securing it to each.

2. ln a drilling machine having a feed screw, a crosshead for supporting the same and brace rods for said crosshead; an eXtension rod provided with a male threaded Copies of this patent may be obtained for end for engagement with said crosshead and wit-li a female threaded end with each of said brace rods for engagement and adapted for insertion between said crosshead and said brace rods.

In a drilling machine screw,

having a feed a crosshead for supporting the same,

brace rods for said crosshead, and nuts for securing said 'brace rods to an extension rod for said crosshead;

each of said brace rods having a male threaded end to fit a corresponding nut to secure th crosshead, and a female thr the end of a corresponding Ll. ln a drilling machine screw, a. crcssliead for e same to said eaded end to tit brace rod.

having a feed supporting the same,

brace rods for said cross-head, and nuts for securing said brace rods to said crosshead,

said brace rods having reduced threaded ends for engagement with said tension rod for each of said ing a reduced, externally nuts; an eX- brace rods havthreaded, end of the same diameter and pitch as the reduced ends of said brace rods and gagement with said nuts from said brace rods to lock adapted for enwlien removed the same to said crossliead, and said extension rods having,

each, an internally threaded end for engagement with the reduced, threaded, end of a corresponding brace rod.

ln testimony as my invention l that l claim the foregoing have signed my naine in presence of the subscribing witnesses this 27th day of April, 1914:.

FRANK T. COOK.

llVitnesses G'no. E. BAivronD, Cines. L. HALE.

Washington, D. G." 

